She was a classless bitch but I too have a pain with idling vehicles, if it's someplace I'm sorta stuck at. Li'l bit o' extra wear and tear on the diesel to have to restart it? Stop, you're breaking my heart.

The lady was, indeed, an obnoxious ass but she had a point. Turn the bleeping noise maker off people, when it makes sense to do so. It's not like she's asking them to start it, run it for 2 minutes, then shut it off, and repeat that about 50 times (or until the battery dies).

I leave my diesel run when I go into a store just so it's nice and cool when I get back in. I do the opposite in the winter.